Allows players to steal coins (in Mario Party 2, 3, and 4) or stars (in Mario Party 8 and The Top 100) from each opponent they pass.

The Bowser Suit (also called the Bowser Mushroom in Mario Party 4) is a somewhat rare item that first appears in Mario Party 2. When used, the character who used it will wear a Bowser costume and be able to take twenty coins from every opponent they pass during their roll. A Koopa Kid may even give a character dressed in a Bowser Suit coins as well.

In Mario Party 4, players can only acquire a Bowser Suit by landing on a Bowser Space and even then, the chances of getting one are slim to none. Waluigi is even pictured holding it on the box art of Mario Party 4. In that game it strongly resembles a Mushroom, giving it the nickname Bowser Mushroom. A player using the Bowser Suit can steal 30 coins from passing an opponent. Additionally, if a player wearing the suit passes Bowser on Bowser's Gnarly Party, they will get 50 coins, and if a player wearing the suit passes Ukiki's Banana Peel Junction on Koopa's Seaside Soirée, they can choose their direction.

In Mario Party: The Top 100, the Bowser Suit returns along with Tug o' War, but now has the wearer's head coming out of the suit's mouth. It also appears as an item, operating as it did in Mario Party 8.